Intel 8XC196MD, 8XC196MH, 8XC196MC manual Address Valid with Write Strobe Mode

8XC196MC, MD, MH USER’S MANUAL

15.5.4 Address Valid with Write Strobe Mode

When the address valid with write strobe mode is selected, the microcontroller generates the ADV#, RD#, WRL#, and WRH# bus-control signals. This mode is used for a simple system us- ing an external 16-bit data bus. Figure 15-20 shows the timing. The RD# signal (not shown) is similar to WRL# and WRH#. The example system of Figure 15-21 uses address valid with write strobe to access byte-wide RAMs with a 16-bit data bus.

ADV#

WRL#

Valid

ADV#

WRL#

Addr

WRH#

Valid

AD7:0

Low

Data Out

AD15:0

Address

Data Out

AD15:8

Address High

16-bit Bus Cycle 8-bit Bus Cycle

A3096-02

Figure 15-20. Timings of Address Valid with Write Strobe Mode

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